<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--列表的搜索和排序-->
<div class="demo">
    <input type="text" v-model="searchName">
    <ul>
        <li v-for="(p,index) in filterPersons" :key="index">
            {{index}}----{{p.name}}----{{p.age}}
        </li>
    </ul>

    <button @click="setOrderType(1)">年龄升序</button>
    <button @click="setOrderType(2)">年龄降序</button>
    <button @click="setOrderType(0)">原本顺序</button>
</div>
<script type="text/javascript" src="../js/vue.js"></script>
<script type="text/javascript">
    new Vue({
        el:'.demo',
        data:{
            searchName:'',
            orderType:0,//0代表原本,1代表升序,2代表降序
            persons:[
                {name:'jack',age:19},
                {name:'john',age:27},
                {name:'tom',age:23},
                {name:'marry',age:16},
                {name:'may',age:25},
            ]
        },
        computed:{
            filterPersons(){
                //取出相关的数据
                const {searchName,persons,orderType} = this
                //最终需要显示的数组
                let fPersons;
                //对persons进行过滤
                fPersons = persons.filter(p => p.name.indexOf(searchName) !==-1)


                //排序
                if(orderType !== 0 ){
                    fPersons.sort(function (p1,p2) { //如果返回负数p1在前,返回正数p2在前
                        //1.代表升序,2代表降序
                        if(orderType === 2){
                            return p2.age-p1.age
                        }else{
                            return p1.age-p2.age
                        }

                    })
                }
                return fPersons
            }
        },
        methods:{
            setOrderType(orderType){
                this.orderType=orderType
            }
        }
    })
</script>
</body>
</html>